Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire according to my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a fragmentary enlarged view; and,

FIG. 6 is a section view taken along line 6-6 in FIG. 5.

In the drawings, the stippled surface shading represents the groove portions of the tread, having the depths illustrated in FIG. 6.

Broken lines in the figures are used to show portions of the tire that are not being claimed, and thus form no part of the claimed design. 

CLAIM The ornamental design for a tread portion of an automobile tire, as shown and described. 